Spring manufacturing machine

ABSTRACT

To increases the number of workable spring shapes, in a spring manufacturing machine which feeds out a wire from a final wire guide ( 7 ) to a wire working space ( 5 ) formed in front of a vertical front wall ( 3 ) of a machine casing ( 2 ), and applies a predetermined work to the wire fed out to the wire working space ( 5 ) or going to be fed out, by a tool going to protrude to the wire working space ( 5 ) or set in a protruding state, thereby manufacturing a spring, a right and left moving table ( 9 ) is provided in front of the vertical front wall ( 3 ) so as to freely move right and left, and a tool mounting device ( 21 ) to which a tool ( 22 ) can be mounted so as to be directed toward the final wire guide ( 7 ) is provided in the right and left moving table ( 9 ).

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a spring manufacturing machine.

[0003] 2. Description of the Conventional Art

[0004] Conventionally, the following structure has been known as this kind of spring manufacturing machine.

[0005] That is, there has been known a machine for manufacturing a spring which feeds out a wire from a final wire guide to a wire working space formed in front of a vertical front wall of a machine casing, and applies a predetermined work to the wire fed out to the wire working space or going to be fed out, by a tool going to protrude to the wire working space or set in a protruding state.

SUMMARY OF THE INVENTION

[0006] An object of the present invention is to provide a spring manufacturing machine which can increase a number of workable spring shapes by adding a tool having good usability to the conventional spring manufacturing machine.

[0007] In order to achieve the object mentioned above, the present invention employs the following means.

[0008] (1) In accordance with a first aspect of the present invention, there is provided a spring manufacturing machine which feeds out a wire from a final wire guide to a wire working space formed in front of a vertical front wall of a machine casing, and applies a predetermined work to the wire fed out to the wire working space or going to be fed out, by a tool going to protrude to the wire working space or set in a protruding state, thereby manufacturing a spring, wherein a right and left moving table is provided in front of the vertical front wall so as to freely move right and left, and a tool mounting device to which a tool can be mounted so as to be directed toward the final wire guide is provided on the right and left moving table.

[0009] (2) In accordance with a second aspect of the present invention, there is provided a spring manufacturing machine as recited in the first aspect, wherein the tool mounting device freely moves backward and forward, up and down, and right and left.

[0010] The present invention achieves the following effects on the basis of the structure mentioned above.

[0011] (1) In accordance with the first aspect of the present invention, it is possible to increase the number of workable spring shapes by effectively utilizing the tool mounted to the tool mounting device on the right and left moving table. Further, when the tool mounted to the tool mounting device on the right and left moving table is not necessary, and when the right and left moving table forms an obstacle in the case of attaching the tool to or detaching the tool from a tool mounting slide or the like provided in the front wall of the spring manufacturing machine, the right and left moving table can be conveniently retreated right or left.

[0012] (2) In accordance with the second aspect of the present invention, it is possible to simply adjust a position of the tool.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013]FIG. 1 is a simplified front view showing an embodiment in accordance with the present invention;

[0014]FIG. 2 is a partly enlarged view of a portion A in FIG. 1; and

[0015]FIG. 3 is a cross sectional view along a line III-III in FIG. 2.

DESCRIPTION OF THE PREFERRED EMBODIMENT

[0016] A description will be given below of an embodiment in accordance with the present invention.

[0017] In this case, in this description, the term “front” means the front side of the paper face in FIG. 1, the term “rear” means the back side, the term “left” means the left side in FIG. 1 and the term “right” means the right side in FIG. 1.

[0018] A spring manufacturing machine 1 has a machine casing 2 including a vertical front wall 3, a wire working space 5 formed in front of the front wall 3 in the machine casing 2, a final wire guide 7 including a wire passage (not shown) which passes a wire fed out toward the wire working space 5 therethrough and is elongate in the back and forth direction, and detachably provided in a rotation body 6 which is provided in the front wall 3 so as to freely rotate around the wire passage, at least a pair of wire feeding rollers (not shown) rotatably provided in the machine casing 2 in the reverse side to the wire working space 5 (the rear side of the front wall 3) in the final wire guide 7, and feeding out the wire while nipping the wire, and a desired number of tool mounting slides (not shown) provided in the front wall 3 so as to freely move forward and backward with respect to the wire working space 5, and to which a tool (not shown) is mounted. In this case, the structure mentioned above is a well-known structure.

[0019] A right and left moving table 9 is provided in front of the vertical front wall 3 so as to freely move right and left in accordance with a structure described in detail below. A pair of upper and lower guide rails 10 are provided in a forward protruding portion 3 a of the front wall 3 so that the longitudinal direction thereof is positioned in the right and left direction, and the structure is made such that the right and left moving table 9 moves right and left along the these guide rails 10. A nut member 13 is provided in the right and left moving table 9, and a ball screw 12, which is rotated by a reversibly rotatable motor 11 and has the axis set parallel to the guide rails 10, is fitted to the nut member 13 by screwing. In accordance with the structure mentioned above, the right and left moving table 9 can be moved right and left at a moving distance L by forward and backward rotating of the ball screw 12. In this case, the right and left moving table 9 may be structured such as to move to the left from the position shown in FIG. 1 at a predetermined distance (for example, the distance L), or the right and left moving table 9 maybe structured such as to move to both the right and the left from the position shown in FIG. 1 at a predetermined distance.

[0020] A pair of right and left guide rails 16, the longitudinal direction of which is positioned in the back and forth direction is provided in the right and left moving table 9, and a back and forth moving table 17 is provided in the guide rail 16 so as to freely move back and forth. The back and forth moving table 17 is structured such as to be moved back and forth by the same operating apparatus 18 as the apparatus for right and left moving the right and left moving table 9.

[0021] An elevating shaft 20 having the axis in the up and down direction is provided in the back and forth moving table 17 so as to freely move up and down, and a tool mounting device 21 is provided in this elevating shaft 20 so as to freely swing horizontally. In this case, the tool mounting device 21 is structured such that the tool mounting device 21 does not move up and down with respect to the elevating shaft 20.

[0022] A tool 22 is detachably mounted to a rear portion of the tool mounting device 21 so as to be directed to the side of the final wire guide 7 (the rear side).

[0023] The elevating shaft 20 is structured such as to be moved up and down by an elevation driving apparatus 23. The elevation driving apparatus 23 has a ball screw 24 which is provided in the lower end of the elevating shaft 20 and has the axis in the up and down direction, a nut member 25 to which the ball screw 24 is fitted by screwing and which is fixed to the right and left moving table 9, a universal joint 26 connected to the lower end of the ball screw 24, an extensible shaft 27 connected to the universal joint 26, a universal joint 28 connected to the lower end of this extensible shaft 27, and a reversibly rotatable motor 29 having a rotation shaft 30 fixed to the universal joint 28 and having a main body fixed to the right and left moving table 9. The extensible shaft 27 is constituted by two shaft members which are nested by a spline structure so that the shaft members do not relatively rotate. In accordance with the structure mentioned above, the elevating shaft 20 (the tool mounting device 21) can be moved up and down by forward and backward rotating of the ball screw 24.

[0024] The tool mounting device 21 is structured such as to be horizontally swung by a swing driving apparatus 33. The swing driving apparatus 33 has a reversibly rotatable motor 34 having a main body fixed to the back and forth moving table 17, a crank shaft 36 fixed to a rotation shaft 35 and having the axis in the up and down direction, and an elongated hole 38, to which a crank pin 37 of the crank shaft 36 is fitted with no play in the right and left direction and which is long in the back and forth direction (not to prevent the crank pin 37 from moving back and forth) and formed in the front portion before the elevating shaft 20 in the tool mounting device 21. In accordance with this structure, it is possible to horizontally swing the tool mounting device 21 by changing the position of the crank pin 37, whereby it is possible to finally move the tool 22 right and left. In this case, the crank pin 37 has a vertical length allowing the tool mounting device 21 to move up and down.

[0025] The spring is manufactured by utilizing a tool provided in a known tool mounting slide (not shown) or the tool 22.

[0026] A description will be additionally given below of modified embodiments or the like.

[0027] (1) The tool includes all of wire working tools to be mounted to the spring manufacturing machine, such as a bending die, a forming tool, a cutting tool, a cut receiving tool and the like.

[0028] (2) A mechanism for right and left moving the right and left moving table 9 is optionally set.

[0029] (3) A mechanism for freely moving the tool mounting device 21 back and forth, up and down, and right and left is optionally set. 

What is claimed is:
 1. A spring manufacturing machine which feeds out a wire from a final wire guide to a wire working space formed in front of a vertical front wall of a machine casing, and applies a predetermined work to the wire fed out to the wire working space or going to be fed out, by a going to protrude to the wire working space or set in a protruding state, thereby manufacturing a spring, wherein a right and left moving table is provided in front of said vertical front wall so as to freely move right and left, and a tool mounting device to which a tool can be mounted so as to be directed toward the final wire guide is provided on the right and left moving table.
 2. A spring manufacturing machine as claimed in claim 1, wherein said tool mounting device freely moves backward and forward, up and down, and right and left. 